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Commit 3352a3b2 authored by Auke Kok's avatar Auke Kok Committed by Auke Kok
Browse files

ixgb: remove lock access in the fast path 



This mimics a change made in the e1000 driver that imitates a slick
tg3 way of avoiding grabbing the lock around restarting the tx queue.

Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarAuke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: default avatarJohn Ronciak <john.ronciak@intel.com>
parent 3f3dc0dd

drivers/net/ixgb/ixgb_main.c

+6 −6
Original line number Diff line number Diff line
@@ -1800,13 +1800,13 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter) 


	tx_ring->next_to_clean = i;



	if (unlikely(netif_queue_stopped(netdev))) {

		spin_lock(&adapter->tx_lock);

	if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&

	   (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {



		if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&

		    (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE))

			netif_wake_queue(netdev);

	}

		spin_unlock(&adapter->tx_lock);

	}



	if(adapter->detect_tx_hung) {

		/* detect a transmit hang in hardware, this serializes the